Import dnbd* from the former openslx-contrib repo as of revision 92.

openslx-contrib is currently read only and will get removed in some
days.


git-svn-id: http://svn.openslx.org/svn/openslx/contrib/dnbd2/trunk@1592 95ad53e4-c205-0410-b2fa-d234c58c8868

1 files changed, 43 insertions, 0 deletions

diff --git a/kernel/fops.c b/kernel/fops.c
new file mode 100644
index 0000000..c098e13
--- /dev/null
+++ b/kernel/fops.c
@@ -0,0 +1,43 @@
+/*
+ * kernel/fops.c
+ */
+
+
+#include "dnbd2.h"
+#include "fops.h"
+
+
+struct block_device_operations dnbd2_fops = {
+	.owner   = THIS_MODULE,
+	.open    = dnbd2_open,
+	.release = dnbd2_release,
+};
+
+
+int dnbd2_open(struct inode *inode, struct file *file)
+{
+	dnbd2_device_t *dev = inode->i_bdev->bd_disk->private_data;
+	if (down_interruptible(&dev->config_mutex))
+		return -EBUSY;
+
+	/* FIXME: How do we put this add/start_device? */
+	if (set_blocksize(inode->i_bdev, DNBD2_BLOCK_SIZE)) {
+		up(&dev->config_mutex);
+		return -EBUSY;
+	}
+
+	atomic_inc(&dev->refcnt);
+	up(&dev->config_mutex);
+	return 0;
+}
+
+
+int dnbd2_release(struct inode *inode, struct file *file)
+{
+	dnbd2_device_t *dev = inode->i_bdev->bd_disk->private_data;
+	if (down_interruptible(&dev->config_mutex))
+		return -EBUSY;
+	atomic_dec(&dev->refcnt);
+	up(&dev->config_mutex);
+	return 0;
+}